Abstract: An educational toy useable to teach elementary mathematics to children includes a spaced series of mutually aligned parallel rods secured in a side-by-side relationship at their opposite ends to a base portion of the toy. Series of counting beads are captively and slidably mounted on all but two of the rods for movement between their opposite end portions. The remaining two rods, each of which has at least one counting bead rod on each of its opposite sides, slidably carry two operational sign beads having convex polygonal cross-sections. Different equation operation sign indicia are suitably positioned on the flat exterior side surfaces of the sign beads such that they can be rotated about their rods to display selected operational signs to the user of the toy.